Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B0000 5A: Vehicle Speed Information Circuit Plausibility FailureDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Vehicle Speed Signal | B0000 5A | B0000 5A | B0000 5A | B0000 5A |
Circuit/System Description
The radio receives a vehicle speed signal from the engine control module (ECM) in order to correlate actual vehicle speed to the movement of the vehicle calculated by the navigation system and reported serial data.
Conditions for Running the DTC
| • | Radio ON. |
| • | Battery voltage must be between 9-16 volts. |
Conditions for Setting the DTC
DTC B0000 5A will set when one or both of the following conditions are present:
| • | Vehicle speed from serial data is more than 5 km/h (3 mph) and vehicle speed pulse from the ECM is 0 km/h (0 mph). |
| • | Vehicle speed calculated from the navigation processing software is more than 36 km/h (22 mph) and vehicle speed pulse from the ECM is 0 km/h (0 mph) for 10 seconds continuously. |
Action Taken When the DTC Sets
No action taken when DTC sets.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Description and Operation
Radio/Audio System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the X4 harness connector at the radio.
- Ignition ON, operate the vehicle drive wheels at 5 mph. Test for 3-7 Hertz between the VSS circuit terminal 15 and ground.
- If the circuit tests normal, replace the radio.
| ⇒ | If not within the specified range, test the VSS circuit for an open, high resistance, short to ground or short to voltage. If the circuit tests normal replace the ECM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM and Radio replacement, setup, and programming
